ARLINGTON, Texas NBC broadcaster Bob Costas used his halftime segment on "Sunday Night Football" to advocate for gun control following this weekend's murder-suicide involving Kansas City Chiefs linebacker Jovan Belcher, causing an immediate debate on social media.

After praising the column, Costas said: "In the coming days, Jovan Belcher's actions and their possible connection to football will be analyzed. Who knows? But here, wrote Jason Whitlock, is what I believe. If Jovan Belcher didn't possess a gun, he and Kasandra Perkins would both be alive today."

Belcher shot and killed Perkins, the mother of his 3-month-old daughter, on Saturday morning, then drove to Arrowhead Stadium and committed suicide in the parking lot of the team's practice facility.